Viable gravity-mediated supersymmetry breaking

Kribs, Graham D.; Okui, Takemichi; Roy, Tuhin S.

doi:10.1103/physrevd.82.115010

Viable gravity-mediated supersymmetry breaking

Journal Article · Wed Dec 08 00:00:00 EST 2010 · Physical Review. D, Particles, Fields, Gravitation and Cosmology

DOI:https://doi.org/10.1103/physrevd.82.115010· OSTI ID:2426403

Kribs, Graham D. ^[1]; Okui, Takemichi ^[2]; Roy, Tuhin S. ^[3]

University of Oregon, Eugene, OR (United States); Florida State University
Florida State University, Tallahassee, FL (United States)
University of Oregon, Eugene, OR (United States)

We present a complete, viable model of gravity-mediated supersymmetry breaking that is safe from all flavor constraints. The central new idea is to employ a supersymmetry breaking sector without singlets, but with D-terms comparable to F-terms, causing supersymmetry breaking to be dominantly communicated through U⁢(1)_R-symmetric operators. We construct a visible sector that is an extension of the minimal supersymmetric standard model where an accidental U⁢(1)_R-symmetry emerges naturally. Gauginos acquire Dirac masses from gravity-mediated D-terms and tiny Majorana masses from anomaly-mediated contributions. Contributions to soft breaking scalar (mass)² arise from flavor-arbitrary gravity-induced F-terms plus one-loop finite flavor-blind contributions from Dirac gaugino masses. Renormalization group evolution of the gluino causes it to naturally increase nearly an order of magnitude larger than the squark masses. This hierarchy, combined with an accidentally U⁢(1)_R-symmetric visible sector, nearly eliminates all flavor violation constraints on the model. If we also freely tune couplings and phases within the modest range 0.1–1, while maintaining nearly flavor-anarchic Planck-suppression contributions, we find our model to be safe from Δ⁢m_K, ϵ_K, and μ → e lepton flavor violation. Dangerous U⁢(1)_R-violating Kähler operators in the Higgs sector are eliminated through a new gauged U⁢(1)_X symmetry that is spontaneously broken with electroweak symmetry breaking. Kinetic mixing between U⁢(1)_X and U⁢(1)_Y is present with loop-suppressed (but log-enhanced) size ϵ. The Z' associated with this U⁢(1)_X has very peculiar couplings—it has order one strength to Higgs doublets and approximately ϵ strength to hypercharge. Here, the Z' could be remarkably light and yet have escaped direct and indirect detection.

View Accepted Manuscript (DOE)

Research Organization:: Florida State University, Tallahassee, FL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Grant/Contract Number:: FG02-96ER40969; SC0010102

OSTI ID:: 2426403

Journal Information:: Physical Review. D, Particles, Fields, Gravitation and Cosmology, Journal Name: Physical Review. D, Particles, Fields, Gravitation and Cosmology Journal Issue: 11 Vol. 82; ISSN 1550-7998

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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